Assembly machine



5 Sheets-Sheet 1 May 5, 1925.

O. L. COFFEY ET AL ASSEMBLY MACHINE Filed March 7, 1923 May 5, 1925.

O. L. COFFEY ET AL ASSEMBLY MACHINE Filed March 7, 1923 5 Sheets-Sheet 2 lllllllffi May 5, 1925.

O. L. COFFEY ET AL.

ASSEMBLY MACHINE Filed March '7, 1923 5 Sheets-Sheet 5 May 5, 1925. 1,536,563

0. L. COFFEY ET AL ASSEMBLY MACHINE Filed March 7, 1923 5 Sheets-Sheet 4 May 5, 1925.

O. L. COFFEY ET AL ASSEMBLY MACHINE Filed March 7, 1923 5 Sheets-Sheet 5 Patented May 5, 1925.

UNITED STATES PATENT orFic-E.

oscae L. corrnv, or HARVEY, AND wAL'rnn on veins, or onrcaeo, rLLrnors, as sreNoRs T0 Wn'I'rI'NG COPQRATIQ1L or HAR E ILLINOIS, A gonnaarron or ILLiNOI's ASSElJ/[BLY MACHINE.

Ap t n fle Ma ch 7, 192;- se o. 6

T 0 all whom it may concern:

Be it known that we, Qscan L. Corner and lam na DE Yarns, citizens of the United States, residing, respectiyely, at Harvey, Cool: County, Illinois, and Chicago, Cook .(ln nty, Illi o s, ave-inve te a t in w d u u m rov men n A s mb y M chines, of which the following is a specifica tion. V

This invention isa machine for facilitating the assembly of irregular shaped receptacles.

The particular embodiment of the invention illustrated in the drawings is designed for applying to the ends of any cylindrical object, such for instance as a rattle barrel for use in foundries and the like, the outer curved surface wall, usually a sheet of comparatively heavy, stiff metal more or less difiicult to manually position and secure in place. The invention will therefore be de scribed in connection with the building of such tattle barrel but this Without intending to limit the scope or" the invention except as specifically hereafter set forth in the claims.

The object of the invention is to provide a power Yen machine adapted to receive the component parts of a' cylindrical member, ,vsuvcl as a ratt w-rrel,andv y h u e of which operators can in unison bore through the flanges the opposite heads of the barrel and acent pontions of the outer enclosing member the necessary holes for the reception ,ofholts or riiiets and can, thereafter, unison, iifldesired, tighten up the bolts at the two ends of the device to form a perfect finished product.

Theinv ention consists in mechanism capabl b a ta nin the b go s i t W lj i chcan easilyand cheaply made; which satistactory n u eaud not r adi y ia $9 a e bf o d r e The inyention further consists in numerqus features and details of construction which will be hereafter more fully set for th in the specifi at n and l m Referring ,to theth'awings in which like numerals glesignate the same parts through; an a e en Figure l is a plan view, partly in section, of a complete mechanism illustrating this invention in its preferred form.

Figure 2 is a side elevation, taken on the irregular line 22 of Figure Figure 3 is a side detail elevation, taken on the line 33 of Figure 1.

Figure 4 is an end View taken from the right hand end Of Figure 2.

Figure 5 is a detailed end View particularly of the tool carrying arm on the irregular line 55 of Figure 1.

Figure 6 is a detailed side View, partly section, on the irregular line 66 of .ure 1.

Figure 7 is an enlarged, sectional, central plan view through the tool holder mechanism.

in 1g Figure 8 is a diagrammatic yiew showing the power cylinder 01? Figure 4 and the yalv e controlling it, with the val 'e parts in' the position to more he piston rapidly to the left in the cylinder.

Figure 9 is a plan, sectional View on the line 9 9 of Figure 8. t

Figure 10 is a changed position view from Figure 8. showing the vvalve in position for slow motion instead of rapid motiqn.

Figure 11. is another changed position View showing the valve in position to moye the piston to the right in the cylinder of ilure 8.

The rattle barrel on which this machine operates is a metal cylinder haying two heavy ends 16 and 1 8- separated a considerable distaince apartandenclosed by a metallie cylindrical case 20, having at some point in its, circumference adoor' for the receptio n of castings and other uses not entering into this invention and therefore not shown. .Gase 20 is secured to the ends 16 and 1 8'by circumferential rows of spaced rivets for bolts 22, passing through holes .25: formed in the outer shell 20" and the flanges 26 of the heads 16 and 18; The problem solved by the machine of this invention is to en'- able the operators to gradually work the member 1 91mm plac ab ut -.t-he'l1eads1 418;; as doing, he ing sueeessiy males 24, placing bolts 22 or rivets in place in said holes and in case bolts are used. tightening up the nuts on said bolts, performing these acts simultaneously at both ends of the rattle barrel-this Without any of the terrific strain required in the purely manual methods heretofore in use.

The work holder for this invention includes a stationary suitably mounted base 30, having slidably mounted thereon pedestals'32 in tongue and groove connection 34 with the base so that these pedestals may be moved toward and from each other and detachably secured in selected position by any suitable means, as, for instance, the bolts 36, having heads 38 traveling in grooves 40 provided for them in the base.

Each pedestal 32 is surmounted by a bearing 12 in which a stub shaft -14 extending toward the center of the machine is secured usually, but not necessarily, rigidly by any suitable means, as, for instance, the bolts 46.

The stub .shafts 44- carry face plates 48 to which the parallel ends 16 and 18 are respectively detachably secured by any suitable means, as, for instance, the removable bolts 50.

One procedure adopted in practice is to remove these stub shafts 44 from the bearings 42, attach the barrel ends to the face plates, wrap the outer shell 20 around the barrel ends and secure it loosely in place by widely spaced, temporary bolts 22 or other temporary securing means, thenpresumably by the aid of a cranelift the entire mechanism to position between the pedestals 32, place the bearing caps 42 in place and tighten up the bolts 16 thereby, because of the accuracy of the bearings 42 positioning the barrel ends 16 and 18 parallel to each other ready for the permanent application of the outer case member 20 to the barrel.

Another method of procedure is to attach each barrel end to its adjacent plate46; place each stub shaft 4:4 in final position on its adjacent pedestal 32 and then apply the outer shell 20 to the rigidly positioned heads 16 and 18 by first fastening one edge 52 in proper position as shown in Figure 2 by means of permanent or temporary bolts 22 at the corners of the sheet and then proceed to Wrap the sheet 20 around the heads 16 and 18, fastening it in place as, hereafter described.

In the application of either of the methods just described, the boring and nut tightening machine device hereafter described only operates through an arc of 180 on one-half of the barrel at a time and when the work on such half is completed, it is necessary to return the machine'to original osition, release bearings 42 and rotate thearrel through 180 so that the machine may then operate to complete the second half of the barrel.

The hole boring and nut tightening mechanism heretofore referred to is all sustained on parallel frame members 56 and 58, secured to the floor or ground by any suitable means as, for instance, the screws 60. J ournaled in the top of frame 56 is a shaft 62 in alignment with a corresponding shaft 64, journaled in the top of frame 58, the axis of these two shafts being coincident with that of shafts 4 1 and the barrel to be worked upon. Each shaft carries at its inner end a sprocket wheel 66 over which passes a sprocket chain 68 engaging a sprocket pinion 70 near the base of the adjacent frame member. The pinions 70 are on opposite ends of a horizontal shaft 72, suitably journaled in bearings 74 on the respective frames 56 and 58, the result of this construction being that rotation of one of these shafts as 62 correspondingly rotates the 0pposite shaft as 64 and this without in any way interfering with the ready access to the rattle barrel or other object sustained by shafts 4 1, and being worked upon by the operating tools of the machine.

The right hand. end of shaft 62 has rigidly secured to it a gear train 7 17576 77 terminating in a hand wheel 78 by means of which an operator can rotate shaft 62 and attached parts to simultaneously rotate shaft 64 and attached parts. This gear train, just referred to, is enclosed in a case or housing 79, rockable on shaft 62 but restrained from rotation by an expansion permitting connection, comprising a pair of lugs 80, loosely embracing another lug 8l on frame 56. i

This slow motion construction is substantially that set forth in Whiting and Townsend Patent No. 1,323,137 and Townsend Patent 1,357,599 and therefore need not be here described in further detail. As fully described in said patents, the gear train which contains worm and spiral gearing is self-locking in whatever position the operator leaves hand wheel 78 with the result that the operator can place shaft 62 and attached parts and consequently shaft 64 and its attached parts in any desired angular position on the circumference of the barrel being Worked upon.

Rigidly secured to shaft 62iby any suitable means not entering into this invention is an elongated tool carrying arm 82, the same being parallel to a corresponding arm 84, rigid on shaft 64-. Each of these arms 82 and 84 is in rigid alignment with a short arm 86 on the opposite side of its pivotal shaft and attached to the end of such short arm is a conventional form of counter-balancing spring device 88, pivotally attached as at 90 near the bottom ofthe adjacent supporting frame. In the particular case here illustrated, each counter-balancing spring device includes two parallel springs attached at their opposite ends to cross bars 92 and 94. the former being in pivotal connection at 90. heretofore referred to. with the adjacent frame member. the latter ba-r'94 being pivoted on a pin 95 projecting from the adjacent short arm 86.

The springs ,88 are of such a strength and tension that they counter-balance the swinging arms 82 and 84 and attached parts in practically any position which the operator manipulating handle 78 may elect to leave them in a path extending through 180 over the top of a barrel sustained in working position as shown in the drawings.

Reciprocatable lengthwise of parallel swinging arms 82 and 84 toward and from the rattle barrel or other work for the machine is a tool frame including in the particular case here illustrated two parallel channel irons 100 and gear carrying frames 1Q2 secured thereto by an suitable means as screws or bolts 104. Eac of these members 102 is located immediately adjacent to an arm 8201' 84 and has journaled upon it a gear 106 meshing with a rack 108 permanently secured by any suitable means, as for instance the bolts 110 to the .side of the adjacent swinging arm. The gears 106 are mounted on oppositeendsof a common shaft 112 with the result that any force exerted on any part .of the tool carriage to force it to move to or from the rattle barrel causes in obvious manner both ends of the tool carriage to move in unison with the result that the supporting channel irons 100 are in all positions of movement maintained parallel to the given initial position.

In the particular case here illustrated the entire tool carriage is reciprocated along arms 82 and 84 by means of a compressed motive fluid, such as air, cylinder mechanism including a conventional form of cylinder 114 surrounded by a plurality of parallel rods 116 slidably mounted through a vertically positioned plate 118 rigidly attached to the ,ends of channel irons 100 adjacent to swinging .arm 82 by any suitable means, as for instance boltsor screws 120, said rods and onsequently the entirzecylinder mechanism being detachably looked in fixed position with reference to the tool carriage by any suitable means, such for instance as selectively tightenable screws 122. This cylinder 1 14 CQHtains a conventional piston 124 mounted on a piston rod 126 reciprocable through head 128 of the cylinder and having its outer free end attached to a fixed point as, for instance. the pin 130 on the side ofthe adjacent swinging arm 82. From the foregoing it will be seen that when and if motive fluid is admitted to the right hand end, ;t the cylinder (Figure8). the entire cylinder and cenwaurntw h t dra nias still be e e en to the right and that the carriage can be moved in .the opposite direction by admitting motive fluid to the left hand end of the cylinder. The mechanism for so admitting motive fluid to the cylinder is provided in the valve mechanism .011 Figures 8 to 11, inclusive which will be full described hereafter. Beciprocatabzle lengt: V188 of the channel irons 100 are two tool heads 132 and 134, each selectively propela-ble independently of the other by manual manipulation of hand wheel 18b to rotate a gear 13,8 meshing with a rack 140 on the upper channel iron 100. These .tool heads 132 and 134 are each provided with a boring tool 142, socket 144. and nut wrench 148; chuck 150. The parts named are identical in construction except that for convenience .they are re versed in horizontal position as shown in the drawings, so that the two wrenches 148 are immediately adjacent to eaqh 0ther, this so that with all four tools rotating in unison, the operator can without stopping the-m selectively bore a hole as shown in Figure 7 in the rattle bar tfl case or can ap. ly a wrench 148 to rotate a nut upon a ho t placed in such a hole, it being obvious that in the position of Figure 7, the wrench does not reach the surface of the rattle barrel case and that when the tool holder mechanism is moved so that adjacent wrench 148 is brought to the position of boring tool 142 in Figure 7, the boring tool will, though rotatin project at the end of the barrel but clear 0 the outer circumference thereof and, therefore, not interfere with the-r o ration of the wrench. Each boring tool c uck 144 is mounted on a .gear 152 meshing with a main drive gear 154 which, in turn, meshes with a gear 156 on the wrench chuck 150. This main drive gearis mounted on a shaft 158 having the non-circular,end 1,60 adapted to be rotated by any suitableextennal source of power not shown, in the particular case here illustrated the workingiend of a pneumatic driven rotater well known in the art. lVhen the operator wants to :notate the tools 142 and 148, vor either one alone in the absence of the other, he simply attaches this pneumatic power rotater to l'lOlltClIGlllflI connection 160 and turns 1 the power.

From the foregoing, ,it will be seen that when an operator .orloperators :position the two tool carriages as shown in Figure 1, apply the power to shaft 158 and then admit air to cylinder 114 .to advance the beams 100, the boring tools 142 will engage opp0- site ends of the barrel ,as shown in detail in Figure 7 and bore a hole 24 in each end: and that on the completion of said boring operation, the operator can, ,by manipulating the valve mechanism (of controlling cylinder 114 retract the tool heads to, ,s the position of Figure '1 manipulate th land Whe l 35-1 awe 9 hea l t? the right and, tool head 134 to the left until the wrenches 148 are in alignment with the holes 24 previously made, whereupon on applying bolts to said holes in the barrel and again advancing the beams 100, these wrenches will be brought into engagement with the nuts on said bolts with the result that rotation of said wrenches will tighten up said nuts, and that by thereafter manipulating the cylinder 114 to withdraw the tools to the position of Figure 1, the parts are in a position to be rotated bodily in a vertical plane to a position where they are ready to bore another pair of holes in the circumference of the barrel worked uponthis vertical movement of the entire tool device being caused by manual manipulation of hand wheel 78 as heretofore fully described.

The machine may be used by a single operator but more efficient results are obtained by employing two, one to look after each tool mechanism 132 and 134.

The particular mechanism for selectively controlling the cylinder mechanism 11 P 124126 in reciprocating the tool devices along the arms 82 and 84 is the valve mechanism shown in Figures 8 to 11, inclusive, the same including a suitably ported case 162 having a pipe 164 leading to the left hand end of cylinder 114. a pipe 166 leading to the right hand end of the same cylinder, a compressed motive fluid intake pipe 168 and an exhaust pipe 170. it being understood that compressed motive fluid is supplied from any suitable source not shown to pipe 168.

Rotatably mounted inside this case 162 on a shaft 172, manually manipulatable by a lever 174, is a valve disc 176, having in it two annular passageways 178 and 180 adapted to assume the various angular posi tions of Figures 8, 10 and 11. In the position of Figures 8 and 9. compressed motive fluid entering pipe 168 travels freely through passage 180 to port 182 in the central body portion 184 of the valve case and thence through pipe 166 to the right hand end of cylinder 114 thus driving the cylinder to the right over stationary piston 124. This movement of the cylinder over piston 124 can only be accomplished by the outflow of motive fluid or the like which was initially in the left hand end of cylinder 114 and this takes place through pipe 164 and the two parallel passages 186 and 188 in member 184 now both in register with passage 17 8: thence through said passage 178 to discharge pipe 17 0. The combined carrying capacity of passages 186 and 188 is equal to or greater than that of passages 182166 with the result that there is no retardation whatever in the movement of the cylinder 114 and attached parts to the right (Figure 8). The passage 186 is, however, very much smaller in carrying capacity than passage 180182 and furthermore, its carrying capacity can be adjusted by manipulating in the obvious manner the needle valve 190 with the result that if the operator moves handle 174 from the position of Figure 8 to that of Figure 9, thereby causing valve member 176 to com pletely shut off port 188, this reduced capacity passage 186 is the only means by which gas in the left hand end of cylinder 114 can escape to pipe 170 and therefore the speed of movement of cylinder 114 and attached parts to the right is reduced in the first instance to the capacity of this passage 186 when wide open and may be still further reduced by the operators closing it off by the use of valve 190. It therefore appears that the operator can at any time check the speed of movement of the tool carriage mechanism controlled by cylinder 114 by throwing lever 174 to the position of Figure 11 and thereafter manipulating valve 190. This slowing is necessary at times when heavy work is being done by the tools 142 and 148.

When the cylinder 114 has moved as far to the right as the operator desires to have it, it is only necessary to throw the lever 174 to the position of Figure 11, to cause the cylinder and the parts carried by it to move in the opposite direction, thus retracting the various tools from the work. In this position, the passage 178 connects port 182 and discharge pipe 170 with the result that the contents of the right hand end of the cylinder has free escape and passage 180 directly connects pipe 168 to port 188 with the result that the compressed motive fluid has free access to pipe 164 and thence to the left hand end of cylinder 114 to thereby force the cylinder and attached parts to the left over piston 124. From the foregoing it will be seen that the operator can by properly manipulating lever 174 retract the tools from the rattle barrel or other work being handled by the machine, at full speed. depending upon the pressure of compressed motive fluid applied to pipe 168 and that he can advance the tools upon the work either at the same speed or a slower regulated speed as he may elect.

In some of the claims the swinging arms 182 and 184 and the interconnecting tool carriage 100 will be referred to as a U- shaped frame.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In mechanism of the class described, in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operating one of said arms, means operatively connecting said last mentioned arm to the other arm to correspondingly rock it, a tool carrying member connecting said swinging arms reciproc'able along them to and from said work supporting means, power means reciprocating said tool carrying member, and a selectively positionable tool head reciprocable on said tool carrying member.

2. In mechanism of the class described, in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operat ing one of said arms, means operatively connecti-n-gsaid last mentioned arm to the ot her arm to correspondingly rock it, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, power actuated reciprocating means engaging one end of said tool carrying member, interconnected means at opposite ends of said tool carrying member insuring its always moving to positions parallel to an initial position, and a selectively positionable tool head reciprocable on said tool carrying member.

3. In mechanism of the class described. in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operating one of said arms, self locking in all adjusted positions, means operatively connecting said last mentioned arm to the other arm to correspondingly rock it, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, power means reciprocating said tool carrying member, and a selectively positionable tool head reciprocable on said tool carrying member.

4. In mechanism of the class described, in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operating one of said arms self locking in all adjusted positions, means operatively connecting said last mentioned arm to the other arm to correspondingly rock it, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, power actuated reciprocating means engaging one end of said tool carrymember, interconnected means at opposite ends of said tool carrying member insuring its always moving to positions parallel to an initial position, and a selectively positionable tool head reciprocable on said tool carrying member.

5. In mechanism of the class described. in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operating one of said arms, means operatively c0nne t ing said last mentioned arm to the other arm to correspondingly rock it, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, power actuated reciprocating means engaging one end of said tool carrying member, interconnected means at opposite ends of said tool carrying member insuring its always moving to positions parallel to an initial position, said interconnected means including a rack on each swinging arm, a gear meshing with each rack and one shaft for both gears carried by the tool carrying member, and a selectively positionable tool head reciprooable on said tool carrying member.

6. In mechanism of the class described, in combination, a support for an object to be worked upon, a. swinging arm pivoted at each end of said support, means operating one of said arms, means operatively conne ting said last mentioned arm to the other arm to correspondingly rock it, counterbalancing mechanism for each of said swinging arms and its load, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, power means reciprocating said tool carrying member, and a selectively positionable tool head reciprocable on said tool carrying member.

7. In mechanism of the class described, in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operating cue of said arms, means operatively connecting said last mentioned arm to the other arm to correspondingly rock it, counterbalancing mechanism for each of said swinging arms and its load, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, power actuated reciprocating means engaging one end of said tool carrying member, interconnected means at opposite ends of said tool carrying member insuring its always moving to positions parallel to an initial position, and a selectively positionable tool head reciprocable on said'tool carrying member.

8. In mechanism of the class described, in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operating one of said arms, means operatively connecting said last mentioned arm to the other arm to correspondingly rock it, retractile spring counterbalancing mechanism for each of said swinging armsand its load, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, power means reciprocating said tool carrying member, and a selectively positionable tool head reciprocable on said tool carrying member.

9. In mechanism of the class described, in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operating one of said arms, means operatively connecting said last mentioned arm to the other arm to correspondingly rock it, retractile spring counterbalancing mechanism for each of said swinging arms and its load, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, power actuated reciprocating means engaging one end of said tool carrying member, interconnected means at opposite ends of said tool carrying member, insuring its a lways moving to positions parallel to an initial position, and a selectively positionable tool head reciprocable on said tool carrying member.

10. In mechanism of the class described, in combination, a support fo an object to be worked upon, a swinging arm pivoted at each end of said support, means operating one of said arms, means operatively con necting said last mentioned arm to the other arm to correspondingly rock it, a tool carrying member connecting said swinging arms reciprocable along them to and. from said Work supporting means, a compressed fluid operated cylinder mechanism carried by a swinging arm operatively engaging an adjacent one end of said tool carrying member, and a selectively positionable tool head reciprocable on said tool carrying member.

11. In mechanism of the class described, in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operating one of said arms, means opcratively connecting said last mentioned arm to the other arm to correspondingly rock it, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, a compressed fluid operated cylinder mechanism carried by a swinging arm operatively engaging an adjacent one end of said tool carrying member, a selectively positionable tool head reciprocable on said tool carrying member, and means regulating said power device which moves the tool carrying member to cause it to operate at at least two different speeds toward said work support and at one in the ipposite direction.

12. In mechanism of the class described, in combination, a support for an object to be worked upon, a swinging arm pivoted at each end of said support, means operating one of said arms, means operatively connecting said last mentioned arm to the other arm to correspondingly rock it, a tool carrying member connecting said swinging arms reciprocable along them to and from said work supporting means, power means re ciprocating said tool carrying member, a selectively positionable tool head reciprocable on said tool carrying member and means regulating said power device which moves the tool carrying member to cause it to operate at at least two difi'erent speeds toward said work support and at one in the opposite direction.

13. In mechanism of the class described, means rigidly supporting opposite ends of a rattle barrel in spaced parallel position along a horizontal axis, a U-shaped frame having its free ends pivoted at opposite ends of a so held rattle barrel and concentrically therewith a tool for working on said rattle barrel carried by and adjustable along the base of said frame, and means swinging said frame to vary the position of said tools circumferentially of the rattle barrel.

H. In mechanism of the class described, means rigidly supporting opposite ends of a rattle barrel in spaced parallel position along a horizontal axis, a U-shaped frame having its free ends pivoted at opposite ends of a so held rattle barrel and concentrically therewith a tool for working on said rattle barrel carried by and adjustable along the base of said frame, means swinging said frame to vary the position of said tools circumferentially of the rattle barrel, and means counterbalancing the frame in all positions.

15. In mechanism of the class described, means rigidly supporting opposite ends of a rattle barrel in spaced parallel position along a horizontal axis, a U-shaped frame having its free ends pivoted at opposite ends of a so held rattle barrel and concentrically therewith a tool for working on said rattle barrel carried by and adjustable along the base of said frame, self locking manually operable slow motion means swinging said frame to vary the position of said tools circumferentially of the rattle barrel.

16. In mechanism of the class described, means rigidly supporting opposite ends of a rattle barrel in spaced parallel position along a horizontal axis, a U-shaped frame having its free ends pivoted at opposite ends of a so held rattle barrel and concentrically therewith a tool for working on said rattle barrel carried by and adjustable along thebase of said frame, self locking manually operable slow motion means swinging said frame to vary the position of said tools circumforentially of the rattle barrel, and means counterbalancing the frame in all positions.

17. In mechanism of the class described, means rigidly supporting opposite ends of a rattle barrel in spaced parallel position along a horizontal axis, a U-shaped frame having its free ends pivoted at opposite ends of a so held rattle barrel and concentrically therewith a tool for working on said rattle barrel carried by and adjustable along the base of said frame, means swinging said frame to vary the position of said tools circumferentially of the rattle barrel, and means moving the bottom of said U frame IOU along its side members to reciprocate said tool into engagement with a rattle barrel being worked upon.

18. In mechanism of the class described, means rigidly supporting opposite ends of a rattle barrel in spaced parallel position along a horizontal axis, a U-shaped frame having its free ends pivoted at opposite ends of a so held rattle barrel and concern" 'ically therewith a tool for working on, said rattle barrel carried by and adjustable along th base of said frame, means swinging said frame to vary the position of said tools circumferentially of the rattle barrel, means counterbalancing the frame in all positions, and means moving the bottom of said U frame along its side members to reciprocate said tool into engagement with a rattle barrel being worked upon.

19. In mechanism of the class described, means rigidly supporting opposite ends of a rattle barrel in spaced parallel position along a horizontal axis, a U-shaped frame having its free ends pivoted at opposite ends of a so held rattle barrel and concentrically therewith a tool for working on said rattle barrel carried by and adjustable along the base of said frame, self locking, manually operable slow motion means swinging said frame to vary the position of said tools circumferentially of the rattle barrel, and means moving the bottom of said U frame along its side members to reciprocate said tool into engagement with a rattle barrel being worked upon.

20. In mechanism of the class described, means rigidly supporting opposite ends of a rattle barrel in spaced parallel position along a horizontal axis, a U-shaped frame having its free ends pivoted at opposite ends of a so held rattle barrel and conceniricall y therewith a tool for working on said rattle barrel carried by and adjustable along the base of said frame, self locking, manually operable slow motion means swinging said frame to vary the position of said tools circumferentially of the rattle barrel, means counter-balancing the frame in all positions, and means moving the bottom of said U frame along its side members to reciprocate said tool into engagement with a rattle bar rel being worked upon.

In witness whereof, we have hereunto subscribed onr names.

OSCAR L. COFFEY. WALTER DE VRIES. 

